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寻求意见这计划隔离n Old House

user-7601308| Posted inGeneral Questionson

Hello,

I am insulating and re-siding my 1938 house in Virginia. Wanted to see if the following plan will work. I currently have full-size 2×4 studs, with 1″ diagonal sheathing on the exterior. I plan to put tyvek house wrap, then 1/4″ furring strips for rain screen, and then 9/16″ – 5/8″ lapped poplar siding.

On the inside, a lot of the stud bay sizes are irregular from twisted studs, and rough sawn anomalies. I have come to the opinion that insulweb and blown in cellulose will be the way to go. It seems like I can get ‘green fiber’ locally, and have seen and read about people doing DIY dense pack with rented machines.
The house is 2-over-2, each floor being 420 square feet.

I own a sawmill and dry kiln and will be cutting my own siding. Instead of drywalling the inside, It makes more sense to me to cut and make 5/8″ shiplap paneling on the interior of the studs.

I understand that will not be a great air barrier, but I also am more inclined to let things breath.

Will this work? or will I have moisture problems? I wonder if I need anything extra, maybe a rosin type paper between the shiplap and studs?

Thanks,
forrest

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Replies

  1. Brian Wiley||#1

    Hi Forrest, you’ll definitely want at least one primary air barrier. The dense pack insulation would be helpful in slowing things down, but it certainly won’t stop air leaks, particularly with what I assume you mean to be some sort of shiplap/tongue-groove sheathing.

    I happen to have that type of sheathing myself, and have found many people here on GBA suggest a self-adhering house wrap in place of the tyvek. The new Benjamin Obdyke self adhering product comes in at about $0.50 per square foot and is available online. It’s definitely possible (and preferable) to have an airtight assembly and still maintain drying potential.

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